Be it known that I, NAHUM J UDSON BUSBY, a citizen of the United States, residing at Boston, in the county of Suffolk, State of 5 Massachusetts, have invented new and useful Improvements in Antislipping Treads for Boots and Shoes, of which the following is a specification. I

- My invention relates to elastic anti-slip- 4 '10 ping treads forboots and shoes, and has for its object to provide means for protecting the'toe of the tread andthe anti-slipping surface from wear. This obiect I accomplish in the manner and by the means hereinafter de- 15 scribed and claimed, reference being had to the accompanying drawing, in which:

2c is a similarview', showing the anti-slipping surfaces therein. Fig. 3 is a central longitudinal sectional view of Fig. 2. Fig. 4 is a transverse sectional view taken on the line 44, Fig.2. Fig. 5 is a similar View taken I Similar numerals of reference-denote"corres onding parts in the several views.

11 they said drawing the reference numeral c1 denotes the body of the sole portion of the formed of some flexible material, such as semi-vulcanized rubber. Said treads are recessedat 3 on then under s1des,[leav1ng a narrow surrounding rim 4 substantially flush-w th the wearing surface, as shown.

These recesses are adapted to receive the anti-slipping material 5 therein, and around their inner edges are undercut-or .beveled at *6, as best seen in Figs. 3 to 5,.whereby the 40- masses of anti-slipping material will be se-' curely anchored therein and will beefiectually prevented from dislodgment therefrom, said anti-slipping material, when placed in position, penetrating into and fill-. mg said undercut portions. i

At the toe of the sole-portion of the tread 'I' materially widen and thicken the rim 4 at: 7, as best seenin Figs. 2 and 3, whereby the anti-sli ping material is more effectuallyprotected rom wear. due to thetstubbing'action of the toe in walking. I also form-the inner, edge of the portion 7 curved reversely' .to the e same being 1 curve of the outer ed e of the toe; the advantage of the sameeing that the rim is materially widened centrally to best resist the wear due to the stubbing action of the foot in walking, while at each side the antislipping material is extended forward beyond the widest portion of said reversely curved section, thus providing an anti-slipping surface over substantially the whole sole of the shoe. In other words, by such construction theiwidth of the rim at 7 is materially in creased without'reducing the forward projection of the anti-slipping area.

I preferto employ as the anti-slipping material a composition of rubber and grit,

and for the latter ingredient'have found finely broken quartz to give the most satisfactory results. v

Thesole and heel treads above described are intended to'be manufactured and sold as articles of manufacture separate and dis tinct from the boots or shoes with which they may be used, and are to be detachably attached to the boots or shoes by sewing, pegging or nailing the same through their rims .4, as will be readily understood.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is? r .1. A tread for boots and shoes, embodying a body portionrof resilient material recessed on its tread surface to leave a narrow surrounding rim, said rim at the toe portion havouter curve of the toeto thereby widen the same, and a filling for said recess of antislipping material.

2. A tread for boots and shoes, embodymg a body portion of resilient material recessed on its tread surface to leave a narrow surrounding rim,.said rim at the toe portion being thickened and having its inner edge curved reversely to the=outer curve of the toe to thereby-widen the same, and a filling for said recess of anti-slipfping materlal'.

In testimony whereo I have hereunto set my hand in the presence of two subscribing witnesses. 1